Molding-machine.



No. 854,690. PATENTBD MAY 21, 1907.

B. L. DAWES & J. P. WHITEHEAD.

MOLDING MACHINE;

APPLIOATION FILED DBO. 2, 1903.

7 SHEETS-SHEET 1.

No. 854,690. I PATENTED MAY 21 1907. B. L. DAWES & J. P.'WHITEHEAD.MOLDING MACHINE.

APPLICATION FILED DEC. 2, 1903.

7 SHEETS-SHEET 2.

FIG. 2.

hmwcozs PIG-.3.

PATENTED MAY 21, 1907. E. L. DAWES & J. F- WHITEHBAD.

MOLDING MACHINE.

APPLICATION FILED DEC. 2, 1903.

7 SHEETS-SHEET 3.

PI G. 4:.

um v

Wtmaooeo No. 854,690. PATENTED MAY 21, 1907. E. L. DAWES & J. F.WHITBHEAD.

MOLDING MAGHINE. APPLICATION FILED DEC. 2, 19 03.

7 SHEETS-SHEET 4.

' FIG. 5.

Qxhimeoom No. 854,690. PATENTED MAY 21, 1907.

B. L. DAWES & .J. F. WHITEHEAD.

MOLDING MACHINE.

APPLICATION 21mm DEC. 2, 1903.

7 SHEETS-SHEET 5.

IMII

Fig.6;

Illll ILII FIG. 9.

v Witnesses attozweq PATENTED MAY 21 E. L. DAWES & J. F. WHITEHEAD.

MOLDING MACHINE. APPLICATION FILED D30. 2, 1903.

7 SHEETS-SHEET 6.

(v m w m 8 'PLTENTFD MAY 21, 1907. E. L. DAWES & J. P. WHITEHEAD.

MOLDING MACHINE. APPLICATION FILED mm. 2, 1903.

7 SHEBTS SHEET 7' mill FIG-412.

witnesses J0 gwuanfow a/rm. OZ

awe-snug EDWARD L. DAVVES AND JOHN F. WHITEHEAD, OF NEW BRIGHTON PEN NSYLVANLA, ASSIGNORS TO STANDARD SANITARY MAN UFACTURIN G- COMPANY, OFPITTSBURG, PENNSYLVANIA.

MOLDING-MACHINE.

Specification of Letters Patent.

' Patented May 21, 1907.

.To all whom, it may concern:

Be it known'that we, EDWARD L. DAWES and JOHN F. WHITEHEAD, of N ewBrighton,

. county of Beaver, and State of Pennsylvania,

have invented certain new. and useful Improvements in Molding-Machinesand we do hereby declare the following to be a full and cleardescription thereof. Our invention relates to molding machines.

The Ob ectof the invention-is to mold in sand various articles of metal.For this purpose the fla'sk is reciprocated vertically While the sand isfalling in the flask. Provision is made fora-very rapid verticalreciprocation of the flask and for a variation in the degreeofreciprocation, among the more important features of invention.

With these objects in view our invention consists in the followingconstruction and combination of parts, the details of which will firstbe fully described, and the features of novelty then set forth andclaimed.

Figure 1 represents a side elevation of an apparatus to which we haveapplied our improvements. frame which supports the flask carrying platewith the'parts located thereon. Fig. 3 is an end view of said 'frame.Fig. 4 is a longitudinal central section of the flask plate agitatingcylinder and its connections. Fig. 5 is a partial plan and a partialhorizontal sectional view of said cylinder. 6 is a partial sideelevation and partial vertical section through certain portions of theconnections of the cylinder. Fig. 7 is a top plan view of the flaskcarrying plate having applied thereto a flask, A a stripping plate and apatterntoillustrate the operation of the machine. Fig. 8 is a centraltransverse section of the same taken through Fig. 7. Fig. 9 is a sideview of'the suspended sand box. 10 is a top ,plan View with the wirebottom removed. Fig. 11 is an end view showing the openings or win s inthe sand box closed. .Fig. 12 is a simi ar view showing the wings openedor dropped.

In the drawings, 1 represents a flask supporting plate supportedsubstantially level with the floor 2 of the plant. This plate 1 israpidly agitated by a cylinder by a vertical reciprocating motion..While the flask is being thus reciprocated, sand from a sand box 4 isdeposited thereon. The frame or sup- Fig. 2 is a top plan view of the aport for'the plate 1 consists of a bed-plate 5 upon which are mounted aseries of vertical I frames 6, the upper edges of which are faced withcushions 7 of Babbitt or other similar soft metal. In case of anyinequality in the plane of the cushions the soft metal soon wears downto an absolutely even bearing. The

a impact of the flask carrying plate 1 in its vertical jarring movementsis received by the I soft metal projections 7.

8 are a series of props secured to the oscillating rods 9 in the frames6, and 10 is a rod for oscillating the props, which is connected to theoscillating rods 9 by means of levers 11. By this means the props 8 areoscillated from a horizontal to a vertical position, in which latterposition they serve to support the stripping plate 38 and its flask whenthe plate 1 andits pattern are lowered to permit the mold to be liftedfrom the machine.

Central of the supporting frames is located the neumatic cylinder 3 forreciprocating the flask carrying plate.

12 is the piston.

The cylinder 3 is closed at its lower end by a plate 13 and open at itsupper end.

The piston 12 is preferably formed of an elongated hollow castingserving for the purpose of guiding the movement of the piston. The upperortion of the piston is provided with a tubu ar socket within which isscrewed or otherwise secured atube 14, which tube preferably of heavymaterial to provide is against fracture. tube 14 is bolted or otherwisesecured the flask supporting reciprocating plate 1 so that the saidplate partakes of the movement of the piston.

The valve apparatus for actuating the piston 12 is carried by the plate13 on the foun- To the upper portion of dation plate 5, 15 being theinlet pipe leading I co a piston 26 operating in an auxiliary cylinder27. Intermediate of the connection of the valve stem 25, with the valve24 and the auxiliary piston 26 is a bell-crank lever 28 provided at 29with a pivotal connection therewith. This bell-crank lever is preferably journaled at 31 to projections formed on the upper outer side ofthe cylinder 3, the upper short arm 32 of which is adapted to beoperated by a projection 33 connected to the flask carrying plate 1 asthe latter descends.

In the side of the cylinder 3 next the auxiliary cylinder 27 are aseries of lateral'passages 34. The cylinder 27 is bolted air-tight tothe side of the cylinder 3 and between the same is arranged a slidingplate 35 having a passage 36 therethrough which is adapted to registerwith anyone of the lateral openings 34, the interior of the cylinder 27communicating freely with the cylinder 3 through any one of the passages34 which is in register with the passage 36 on the slide 35 and whichthe piston-12-of the cylinder 3 uncovers.

37 is the exhaust passage from the auxiliary cylinder 27 communicatingwith the outer air when uncovered by the auxiliary piston 26.

The steam passage 23, ports 17',- 18 and 19 and passages 34 and 36v areelongated, while narrow in vertical section, in order to give ainplepassage to the operating fluid.

I The flask upporting plate 1 which is, in

this instance, substantially level with the floor' may be of anyparticular shape according to the particular casting to bemade. In

this instance we have'shown the flask sup-- porting plate 1 adapted moreparticularly for the casting of bath tubs, it bein understood, however,that we, do not 00 e ourselves to the casting of any particular articleby the machine.

In the casting of roll rim bath tubs, we provide the plate 1 with astrippingplate 38 which embraces the lower outer edges of the pattern 39of the tubto be molded.

40 is the flask mounted upon the stripping plate within which thepattern rests, the flask and stripping plate being held in place by pins41 and lugs 42 on the sides of the flask, stripping plate and flasksupporting late. It will notbenecessary to illustrate any further themethod of casting an article such as a bath tub, the operation being theusual one and well'known, except in so far as it is necessary in orderto set forththe 'patentable features of this machine.

Above the flask is a sand box or hopper 42' containing a sufficientquantity of sand to fill the flask and its cope or drag during theoperation of reciprocating or jarring the flask. The hopper 42 with thesifter- 4 is adapted to be moved above and away from the flask. In thedrawings the hopper 42 and the sifter are shown mounted u on anoscillating. support 43 which permits t e hopthe way. The

about 130 times per and sifter to be' swun'gfor rotated sidewise awaynecessary in order that the mold or flask may be lifted from the flasksupporting plate 1 by means of attachments secured thereto and connectedwith the crane 44-for hoisting and moving the same. The sifter 4 is hunbelow the hopper 42 from the jib 45 b mks 47,, and the means foragitating the si ter, as cylinder piston 46, are securedto the rotatablesupport 43 which permits the whole sanding apparatus to be bodily swunout of sifter box 4 is vibrate bodily upon the links 47' by the cylinder46. The sifter 4 is provided with a sieve 48 and beneath the sieve is aseries of pivoted wings '49 secured to bearings 50. The bearings of fromthe topof the flask.- This is i these wings'are .connected by levers 51and links 52 whereby they may be simultaneously operated by a lever 53operated by a pull-rod 54... a

When the wings 49 are horizontal, the bottom of the sifting 'boxisclosed, in which position the locking lever 55 pivoted at 56 enga es thelevers and links 51 and 52 and ho ds the same in a closed position. Whenit is desired to drop or open the wings 49, the pull-rod 57 of the lever55 is operated, which releases the lever. 55 from the link mechanismof'the wings and allows the same to drop or open. I

The operatlon' of the jarring or agitating cylinder isentirely-automat1c.' When the inlet valve-is o ened, the air flowsthroughthe ports 17 an ports 22 to the under side of the piston 12through .the passage 23. The piston then. rises until it uncovers theparticular passage or port 34 which is in register with the port orpassage 36in the adjustable foo slide 35. When that degree of upward logmovement is reached, the air flows through the passages 34 and 36 intothe auxiliary cylinder 27 and forces the auxiliary piston 26 I outwardlyuntil the exhaust port 37 therein.

is uncovered. This outward movement of I the piston 26 and the valvestem 25 has shifted the main valve so that it has closed the inlet port17 and opened communication with passa e 23 and the exhaust port 19leading to t e outer air. The piston 12 then falls rapidly under theescaping air. Just before the piston 12 reaches the bottom of thecylinder 3, the projection 33 on the flask carrying plate 1 comes incontact with the short arm 32 of the bell-crank'lever 28, which beingconnected to the valve-"stem shifts valve 24 inwardly or toward thelarge 'oylin-j der, thereby cutting off communication be tween thecylinder and the exhaust and, again opening communication with the inletIt will be'seen 1 I 2 5 pipeand the c linder,'when*the operation is .Theoscillation of this cyl-. With a pressure of on will'reciprocate 1 3Oexcept that shown in register therewith in Fig. 4 of the drawings, thedegree of the reciprocation of the flask carrying plate will vary, thestroke of the piston 12 being sub stantially the same as thedistance'between the lower end of the cylinder 3 and the particularpassa e 34 in register with the passage 26 of the p ate 35. This rapiddegree of reciprocation of the flask over anything hitherto accomplishedin sand molding machines is accompanied by an increased degree ofcompactness and uniformity of ramming of the mold. impossible to attainunder the comparatively slow manipulation of the present mechanicallyoperated jarring means.

The compactness and evenness with which the sand is rammed is also duein large meas* ure to the continuous feeding of the sand to the moldduring the ramming operation, instead of, as is usual, filling the flaskand .the superimposed sand box with sand before jarring the same.

It will be noted, referring specially to Fig. 10, that the wings orgates 49 cover only a portion of the sifting box. In molding a bath tubor any other article in which the pattern is disposed centrally of themold, it is desirable to pack the sides of the mold around the'patternfirst before coverin up the pattern and packing the entire top 0 themold. By arranging the wings 49 as shown, sand is deposited through theouter edges of the box 4 down and around the sides of the flask belowthe box during the compacting operation, and after the sand is packed toa level with the top of the pattern, the wings 49 are then dropped .oropened permitting the sand accumulated thereon to fall on the top of thepattern, after which the sand sifts through the box evenly throughoutthe area of the same. The peculiar construction of this sifter makes itpossible to feed sand continually to the mold during the jarringmovement of the flask and secure the improved results before referredto. I

The area covered by the win s 49-and their particular disposition upon t1e bottom ofthe sifter will be governed by the shape of the particularpattern to be molded and cast, it being understood that the Wings maycover or uncover different areas of the sifting box.

The oscillating props 8 when arranged ver-, tically, engage projections60 on the stripping plate-38 and serve LO elevate the plate and theflask while the pattern, as 39, and the plate 1 are being lowered fromthe mold.

For the purpose of guiding the movement of'the piston and the cylinderand the flask carrying plate 1 in their movements, we provide a seriesof angle-iron guide posts 51 Which embrace the corners of the plate 1and regulate its vertical movement. I I i While we have referred to thecylinder 3 as a' pneumatic cylinder, it will be understood that thecylinder may be operated by any other fluid supply such as steam, water,gas or the like.

In operation the hopper 42 is swung over the flask and dischargedtherein, and while the jolting or jarring operation is being erformedthe hopperis returned and reled so that no time is lost.

It is common to jolt a pattern plate or table by means of a verticalpost or standard disposed centrally thereunder, the post to receive theimpact in arresting the downward jolt of the table. WVe have found thatwhere the olt of the table is received upon a central post beneath thepattern plate that there is liability of breaking the pattern, patternplate, stripping plate or flask. Especially when heavy moldings aremade, is this liability to fracture imminent. To avoid this defect wehave arranged a stop extending in a series of contacts, such as 7, overa considerable zone about the jolting cylinder so as to take up thisstrain. These stops 7 may be arranged as shown in Fig. 2, or they may bedisposed in circular rim oIj-other approved W8, l

The drawings which we have used to illustrate this invention exemplifyonly one form and manner of carrying out our invention. It will beunderstood that the invention is not limited to the particular detailsshown by the drawings, but that the inventive act contemplates allvariations in the particular embodiment of the invention which may beincluded under the following claims.

What we claim is:

1. The combination in a molding machine, of a reciprocating mold late, amain cylinder and piston for operating the same, a valve mechanism foractuating the piston, an auxiliary cylinder and piston, and means forcon, necting the reciprocating plate and main and auxiliary pistons forautomatically actuating the same.

2. The combination in a molding machine, of a reciprocating mold plate,a main cylinder and piston for operating the same, avalve mechanism foractuating the piston, an auxiliary cylinder and piston, a series ofconnections between the two cylinders, means for opening up any one ofsaid connections, and

means for connecting the reciprocating plate and main and auxiliarypistons for automatically actuating the same.

3. In a molding machine, the combination of a main cylinder and piston,an auxiliary cylinder and piston,-a valve mechanism connecting bothpistons, a reciprocating mold plate, a rod connecting said valve and theauxiliary piston, and a lever connection between the mold plate and saidrod.

' 4. In a molding machine, the combination of a pattern plate, means forjolting said plate, and an anvil frame below the pattern plate havingpoints thereon.

of a cylinder, and an anvil frame having multiple soft metal contactpoints disposed at the sides of the cylinder.

6. In a molding machine the combination of, a main cylinder and piston,an auxiliary cylinder and piston; said cylinders being connected by aseries of fluid passages, means for connecting any one of'saidfluid-passa es and cutting out the others, a valve, mechanism connectingboth' pistons, .a reciprocating mold plate, arod conn'ectin said valve-and the auxiliary piston, and a ever connection 5. In a moldingmachine, the combination" a between the mold plate and said, rod.

7. In a molding machine the combination of a frame, a mold plate, meansfor reciproeating the mold plate, a flask upon the. mold plate, a hopperand sifter above the mold plate, a swmgin jib supporting the hopper andsifter and a apted to swing the latter to and away from above the flask,and a traveling crane adapted to handle'the flask. 1 8. The combinationin a molding machine, 4

' ot a reciprocating mold plate, a main cylinder and piston foroperating the same, a

I valve mechanism for actuating the piston, an

auxiliary cylinder and piston having a port multiple soft metal contact'controlled by said iston, means connecting the reciprocating p ate and.main and auxiliary pistons, and multiple ports connecting the main andauxiliary piston.

9. The combination in a molding machine,

valve mechanism for actuating the Piston, an auxiliary cylinder andpiston, means connecting the reciprocating plate and main andauxiliary'pistons, multiple ports connecting the main and auxiliarypistons, and means for controlling the passages in said ports.

10. The combination in a molding machine, of a reciprocating mold-plate,'a main cylinder and piston for operating the same, a

. valve mechanism for actuating the piston, an

-of a reciprocating mold-plate, a main cyl1n-- der and piston foroperating the same, a

auxiliary cylinder and piston having :a port I coiitrolled by saidpiston, and means for connecting the reciprocating plate and main andthesame.

In, testimony whereof We aflix our signatures. I I

E. DAWESJ g JOHN F. W'HlTEHEAD.

Witnesses: 3

" E. R. FRENcH,

' F. T. DAWES.

so auxiliary piston forautomatically actuating

